Part 1. Definition
In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 
Part 2. Example
[header] How to create a christmas tree forest [title] Consider the type of tree you want to plant. [step] There are a wide variety of christmas trees and include fir, pine, spruce, cypress, and cedar. These trees thrive in different climates and look different from one another. <sep> (A) It is important to research the tree before setting up your tree to try it out to make sure you can write the tree's growing season so that you can get the most supplies you need. If you're just interested in having a tree stand out, then make sure to check for the following : [substeps] Spruce trees. (B) [substeps] Trees green may be used in a mix of green and evergreen. Greens, such as pintos and olive oil, may be more delicate than these. (C) Where the trees grow together is up to you. [substeps] Spruce trees light up the night for hours in the morning and drown out the morning sunrise between afternoons. (D) Think about where your tree forest will be located and choose a tree that can thrive in that climate. [substeps] Balsam firs are a popular christmas tree species that grow in the northern united states and canada, in hardiness zones 3-5 or states like minnesota, north dakota, and montana.
Answer: D
Explanation: This is a good example. Only option D is about Christmas trees. So, it's the correct option.
Part 3. Exercise
[header] How to write a theme essay [title] Read the essay prompt carefully. [step] A theme essay usually responds to a specific prompt given to you by a teacher or professor. Most essay prompts will ask you to identify the theme, or the overarching message, in a text. <sep> (A) Specifically, ask about your thesis or thesis. [substeps] Request a specific thesis statement for the essay prompt. (B) Look at the terms used in the prompt and highlight keywords or important terms. This will help you identify what you need to address as you write your essay. (C) These prompts will prompt you to provide an overall outline, a general outline, and finally a detailed overview of your topic, providing information specific to your subject. [substeps] Read the prompt for a little more information. (D) Start by reading through the prompt you're presented with. [substeps] Some themes, like love and pleasure, require a specific type of prompt.
Answer:
B